| Official Name: | De Witt Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Clinton |
| Area Total Km2: | 141.1 |
| Area Land Km2: | 140.69 |
| Area Water Km2: | 0.41 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 54.48 |
| Area Land Sq Mi: | 54.32 |
| Area Water Sq Mi: | 0.16 |
| Area Water Percent: | 0.29 |
| Population As Of: | 2000 |
| Population Total: | 6346 |
| Population Density Km2: | 45.1 |
| Population Density Sq Mi: | 116.8 |
| Elevation M: | 210 |
| Elevation Ft: | 689 |
| Coordinates: | 41.8236°N -90.5258°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0467713 |
De Witt Township is a township in Clinton County, Iowa, United States. As of the 2000 census, its population was 6,346.
De Witt Township was organized in 1843. It is named for DeWitt Clinton.[1]
De Witt Township covers an area of 54.48sqmi and contains one incorporated settlement, De Witt. According to the USGS, it contains two cemeteries: Elmwood and Saint Joseph.
Crystal Lake is within this township. The streams of Ames Creek, Crystal Creek, Rock Creek and Silver Creek run through this township. The Ames Creek Bridge, which carries 300th St. over Ames Creek, is listed on the National Register of Historic Places.